Warning sign rules — Iowa Permit Test

Warning signs for farm machinery and horse-drawn vehicles mean watch for slow vehicles; reduce your speed and pass slowly.

You close in on a slow tractor or buggy very fast, and passing fast can scare a horse or clip a wide machine.

Be alert for slow-moving, farm equipment on the roadways.

A T-intersection ahead sign means the road you are on does not go straight ahead; prepare to turn right or left.

The road ends at a cross street, so you must slow down in time to make the turn.

The road you are on does not go straight ahead.

A school bus stop ahead sign means a stopped school bus will pick up or drop off passengers ahead; watch for children and be prepared to stop.

Kids getting on or off a bus may cross the road without looking, so be ready to stop.

You are nearing an area where a stopped school bus will pick up or drop off passengers.

Chevron signs are used along with curve signs to draw extra attention to a change in the road's direction.

Chevrons point the way the road bends, so you can follow the curve at night or in bad weather.

Used in addition to the curve signs when there is a need to draw added attention to a change in the road’s direction.

A ramp speed sign shows the recommended speed on an exit ramp.

Exit ramps often curve tightly, and taking one at highway speed can roll a car.

The recommended speed on an exit ramp.

You see a farm machinery warning sign. What should you do?

Reduce your speed and pass slowly. You close in on a slow tractor or buggy very fast, and passing fast can scare a horse or clip a wide machine. Iowa Driver's License Manual, p.9: “Be alert for slow-moving, farm equipment on the roadways.”